Thierstein Castle was built in the early 14th century by Albrecht VI of Wildstein. Later it was moved to the hands of Nuremberg burgraves and the house of Hohenzollern. In 1553, during the Second Margrave War, Thierstein was occupied by Bohemian troops. In 1603 Margrave Georg Friedrich of Brandenburg ordered to abandon the castle and the construction of a new office building outside the village of Thierstein. Nevertheless, the most necessary repairs were still carried out at the Thierstein castle during the Thirty Years' War. The end of the Thierstein castle came in 1725, when it was destroyed by fire.
Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.